IRCBot.CSO

It spreads and affects other computers.
It uses the infected computer to take malicious actions on other users.
It carries out actions that decrease the security level of the computer.
It uses stealth techniques to avoid being detected by the user.
It uses anti-monitoring techniques in order to prevent it being detected by antivirus companies.
It spreads
, through shared network resources.

Affected platforms:

Windows XP/2000/NT/ME/98/95/3.X

First detected on:

Dec. 5, 2009

Detection updated on:

Dec. 5, 2009

Statistics

No

Brief Description

IRCBot.CSO is a worm that spreads by copying itself, without infecting other files.

It affects productivity, preventing tasks from being carried out:

In the affected computer:
it converts the computer into a platform for taking malicious action surreptitiously: spam sending, launch of Denial of Service attacks, malware distribution, etc.

It reduces the security level of the computer:
it awaits remote-control orders received through
HTTP or FTP.

It uses stealth techniques to avoid being detected by the user:

It uses techniques included in its code to hide itself while it is active.

It uses several methods in order to avoid detection by antivirus companies:

It terminates its own execution if it detects that it is being executed in a virtual machine environment, such as VMWare or VirtualPC.

IRCBot.CSO uses the following propagation or distribution methods:

Exploiting vulnerabilities with the intervention of the user: exploiting vulnerabilities in file formats or applications. To exploit them successfully it needs the intervention of the user: opening files, viewing malicious web pages, reading emails, etc.

Computer networks (shared resources): it creates copies of itself in shared network resources to which it has access.